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    help. hdc3 18 rattle noise?

    First off I had a 4 sundown nightshade v1 15s and 1 of them started doing this with no obvious reason why. It was the one I had been using by itself while the build was in progress. Now I got a smaller car. I've been using the same crappy amp as I did when I used the single nsv1 (hifonics bxi2008 not a great amp I know) but I've been running this hdc3 18 aluminum coil since it was new and its only been like 2 months but today thanks guysor yesterday it started rattling especially on low notes. No tinsel slap. It has direct leads but I looked anyway. All visible suspension is in tact. Same thing happened w the ns as I said. Now I'm wonering if anyone has any insight id appreciate itif you could help me out. Both coils work. Havnt tested the loads. The box is tiny for it. Its like 5 cubes before sub displacement. Its temporary and it gets loud anyway but I have it in the trunk of a grand am for now so don't pick on me too much. Also...if I'm a bit incoherent its because I'm drunk lol thanks guys.







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    RangerDangerV2's Avatar
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    Re: help. hdc3 18 rattle noise?

    you are sure it is from the subwoofer(s)??



    1999 Tahoe
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    4th order
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    Re: help. hdc3 18 rattle noise?

    Quote Originally Posted by RangerDanger View Post
    you are sure it is from the subwoofer(s)??
    Purdy darn sure. Pulled it out of the box and tried each coil on free air did it them too. Obviously not as bad but still a bit.




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    Re: help. hdc3 18 rattle noise?

    coil rub maybe??



    1999 Tahoe
    2 sa12s
    4th order
    145.18 @33z... with less than 500 watts!

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    Re: help. hdc3 18 rattle noise?

    Quote Originally Posted by RangerDanger View Post
    coil rub maybe??
    Possible but it doesn't rub when I push on it. I know these cones are floppy and are known to hit unevenly due to the flexibility




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    Re: help. hdc3 18 rattle noise?

    Quote Originally Posted by ChevyRidinLow View Post
    Possible but it doesn't rub when I push on it. I know these cones are floppy and are known to hit unevenly due to the flexibility
    The spiders are known to have a lot of issues too...any chance you can pop off one of the dustcaps and peak inside to check and see if anything is stuck in there by chance? I have a feeling one of the spiders came unglued or something...




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    Re: help. hdc3 18 rattle noise?

    Quote Originally Posted by ChevyRidinLow View Post
    Possible but it doesn't rub when I push on it. I know these cones are floppy and are known to hit unevenly due to the flexibility
    actually its probably a busted t joint (where former is glued to cone)...



    1999 Tahoe
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    Re: help. hdc3 18 rattle noise?

    The t joint is solid. Idk how to pop off a dustcap without ******* it up otherwise it would have been the first thing I did lol




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    Re: help. hdc3 18 rattle noise?

    don't need to remove the dustcap to check the spider. just go around the spider landing and try to lift up on it. Does it have the plastic ring?




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    Re: help. hdc3 18 rattle noise?

    Check to make sure the dustcap itself is held on tightly.



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    Re: help. hdc3 18 rattle noise?

    Dustcap is tight. Spider is secure. It does have the plastic ring tho




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    Re: help. hdc3 18 rattle noise?

    These have 2 dustcaps.....there is one underneath the one you see. Clearly a mechanical issue. The AQ subs are notorious for variations of this, if you really beat the crap out of it you could have broken the coil former, that buzzes and you'll never see it until you cut out the softparts.




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    Re: help. hdc3 18 rattle noise?

    Quote Originally Posted by hispls View Post
    These have 2 dustcaps.....there is one underneath the one you see. Clearly a mechanical issue. The AQ subs are notorious for variations of this, if you really beat the crap out of it you could have broken the coil former, that buzzes and you'll never see it until you cut out the softparts.
    Well I've only got 1500 or so going to it in a tny box. It barely moves the thing. I freeaired it today and it just sounds like something hitting every time the cone goes up and every time it goes down. I really don't. Think the former is broken




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    Re: help. hdc3 18 rattle noise?

    Could be the bottom spiders separating from the former, you'd never see that either.

    Really you have nothing to lose prying off both dustcaps and taking a look. You may be able to get them off in one piece and replace them when done, but not like a different dustcap is a lot of money if you can't.




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    Re: help. hdc3 18 rattle noise?

    Pictures and or a video?




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